What does bool mean in c language?

In C language, the bool data type represents a Boolean value (true or false). It has two possible values: true or false. The bool type is used in conditional expressions to control program flow. It can be assigned via the assignment operator and compared via the comparison operator. Additionally, the bool type can be converted to other data types such as int and double.

The meaning of bool in C language

In C language, bool is A data type used to represent Boolean values ​​(that is, true or false). The syntax is as follows:

<code class="c">bool my_bool; // 声明一个bool变量</code>

Each bool variable can only take two values:

• true: means true.
• false: means false.

Use of bool type

The bool type is mainly used for conditional expressions to control the execution flow of the program. For example:

<code class="c">if (my_bool) {
  // 执行此代码块，因为my_bool为真。
} else {
  // 执行此代码块，因为my_bool为假。
}</code>

Comparison of bool type

bool variables can be compared with the following operators:

• ==:equal.
• !=: Not equal.

Assignment of bool type

bool variables can be assigned values ​​through the following assignment operators:

• =: Assignment.
• =: Assign true to the variable.
• -=: Assign false to the variable.

bool type conversion

bool variables can be converted to other data types, for example:

• int: True is converted to 1, false is converted to 0.
• double: True converts to 1.0, False converts to 0.0.

Example

The following is an example of a small program using the bool type:

<code class="c">#include <stdio.h>
#include <stdbool.h>

int main() {
  bool is_true = true;

  if (is_true) {
    printf("is_true is true.\n");
  } else {
    printf("is_true is false.\n");
  }

  return 0;
}</code>

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